opaque的意思是什么

　　例句：

　　The glass was filled with an opaque liquid.

　　玻璃杯里装满了一种不透明的液体。

　　The report was written in long, opaque sentences.

　　报告中的句子又长又难懂。

　　The opaque part gives prominence to the surroundings of the picture.

　　这幅画阴暗的部分突出了周围的部分。